Independent screw closure



INDEPENDENT SCREW CLOSURE Filed Oct. 30, 1935 Patented Apr. 1936 UNITED STATES-,PATENT OFFICE INDEPENDENT SCREW CLOSURE Joseph Andrew Burns, Toronto, Ontario, Canada Application October 30, 1935, Serial No. 47,344

[n.Canada October 19, 1934 5 Claims. (Cl. 221-60) ,rying the pivotal connection so as to provide an interii'tting connection in the form of a claw or the like that is engaged by the closing oi the cover.

The object of the present invention is to pron vide a closure Iwith a base which pivotally carries the cover and has a threaded bore for screwing onto the neck of the container so that the base may be utilized to hold the cover in its closed position. This is accomplished by -mountingfthe base-on the neck portion in' such a. manner that it has a partial turning movement sufilcient to causethe neck to abutthe cover when turned in a screw-on direction. s

A distinctive advantage of this construction is that the cover can be held in anopen position by turning the base relative to theneck so as to cause the neck to protrude slightly therethrough in order to act as a stop. The cover is preferably provided Awith a seat such as a cork insert or the like for engagement by the neck of the container with a view to making an air-tight closure.

Referring to the accompanying drawing:

Figure 1 is a plan view of the invention applied to the threaded neck oi' a collapsible tube.

Figure 2 is a side elevation depicting the cover o1' the closure in its closed position.

Figure 3 is a plan view similar to Figure 1, but.

showing the cover swung open.

Figure 4 is a sectional view through the closure and neck portion of the container. In this view the cover is shown closed.

Figure 5 is a similar sectional view butiihow'-A ing thevcover open.

In the accompanying drawing, the inventionis shown' in its application to a collapsible tube which is generally indicated by/ the reference numeral 6 and has an externally threaded neck l. The base 8 surrounds the neck and has an internally threaded bore by Whiclr it is mounted on the neck so that upon being turned it will be fed axially according to the direction of rotation. In order to prevent the base from being unscrewed from the neck it is preferable to provide a shoulder orfotlier expediency that will act as a stop bore or recess 8 and upsetting the outer extremity of the neck as at 8" so as to engage the counterbore or recess. The base is preferably oi?Vv an oval shape as shown and the cover 9 is also of an oval shape, the cover being lpivoted at I0 5 to the base at one side of the neck. It is preferable to embody the pivotal member in the cover so that it will extend from its underface only and not be seen from its outerface.` The pivotal member may be upset as customary in order to 10 form a shoulder to secure the cover to the base in a swivel relation. The base is provided with a groove IU diametrically opposite the pivot o1 the cover for engagement with a tongue I i carried by the cover. The groove preferably terl5 minates in a shoulder l0" that acts as a stop jor the cover when it isin its closed position, but

the tongue and groove are yso positioned that they will interiit as the cover is swung to its closed position.

A sealing member l2, such as a cork disc or the like, is lodged in a recess in the cover for abutting engagement with the neck of the container. According to this construction the cover can be locked in its closed position by giving the base a partial turning movement in relation to the neck of lthe container suiicient to bring the neck inabutting engagement with the sealing member I2. It has been found in actual practice that by making the threads of a suitable pitch a half turn of the base is suilcient to secure the cover. To release the cover the base is turned in a screw-off direction which releases the neck from engagement with the seat. This enables the cover tobe swung transversely of the base to its open position.

What I claim is:-

1. The combination with the neck of a container, of a closure comprising a base having a bore therethrough by which it is turnably mount- 40 ed on said neck, intertting means on the neck and bore whereby the base is moved axially of the neck upon being turned, a cover pivoted to the base at one side of the neck and swingable transversely over the neck orifice, intertting means carried by the cover and the base at the other yside of the neck such that binding pressure is apf plied thereon by turning the base and cover as a.

unit to cause the neck to engagethe cover.

2. In a closure for a container having a disi lwith by a threaded bore, a. cover pivoted to the base eccentrically of the neck vand swingable` transversely over the dispensing mouth, and

means carried by the base and the cover to inter# nt as the cover is swung to a closed position in which the cover is retainable by turning the base g to cause the neck to abut the underfaqe of the cover.

3. In a closure for a container having a dispensing mouth encompassed by a. threaded neck,

a. base encircling the neck and engaged therewith by a threaded bore, a cover pivoted to the base eccentrically of the neck and swingable transversely over the dispensing mouth, a sealing seat carried by the cover for engaging the neck; and means carried by the base and the cover to intert as the cover is swung to a closed position in which the cover is retainable by turning the base to cause the neck to abut said seat.

4. In a closure for a kcontainer having a dispensing mouth encompassed by a threaded neck,

a base encircling the neck and engaged therewith by a threaded bore, a cover pivoted to the base eccentrlcally of the neck and swingable transversely over the dispensing mouthfa tongue carried by the cover at an angle to the neck axis and remotely of the pivotal axis of the cover, a groove formed in the base and disposed to engage said tongue as the cover is swung to a .closed position in which the cover is retainable by turning the base to cause the neck to abut an underface of the cover.

5. A closure for a collapsible tube 0r other container having a dispensing orice encompassed by anexternaily threaded neck, said closure comprising a base encircling said neck and having a threaded bore extending `completely through it threadedly engaged with the neck, a cover shiftably mounted on the base and constrained for movement only in a plane at right angles to the neck axis and disposed thereby to close and open said orice according to its position, and interlocking means on said base and said cover whereby the c`over is retainable over the orifice by turning the base in a screw-on direction sui'- cient to feed the neck into wedging abutment 

